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From "Uma Maheswara Rao G (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (HDFS-3731) 2.0 release upgrade must handle blocks being written from 1.0
Date Tue, 31 Jul 2012 04:48:36 GMT

    [ https://issues.apache.org/jira/browse/HDFS-3731?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13425517#comment-13425517

Uma Maheswara Rao G commented on HDFS-3731:

sd.root/previous >>> sd.root/current/BPID/current/finalized
sd.root/blocksbeingwritten >>> sd.root/current/BPID/current/rbw
Sounds good to me for Hadoop-2 upgrade. Here we have wrapped all the folders inside current.
That gave some advantage here for not changing any code in older versions.

Other point what I considered is, 
If I am running the version with 20.203 and wanted to upgrade to hadoop-1.
In this case, still we will have the problem right? Because we are handling blocksBeingWritten
as separate folder than current in 20.x versions.
If you agree, may be we can file separate JIRA for that, as this JIRA mainly talking about
2.0 upgrade from 1.0.

> 2.0 release upgrade must handle blocks being written from 1.0
> -------------------------------------------------------------
>                 Key: HDFS-3731
>                 URL: https://issues.apache.org/jira/browse/HDFS-3731
>             Project: Hadoop HDFS
>          Issue Type: Bug
>          Components: data-node
>    Affects Versions: 2.0.0-alpha
>            Reporter: Suresh Srinivas
>            Assignee: Todd Lipcon
>            Priority: Blocker
> Release 2.0 upgrades must handle blocks being written to (bbw) files from 1.0 release.
Problem reported by Brahma Reddy.

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